perf: Don't increment the device list version when updating local info

src/api/client/message.rs

@@ -1,6 +1,6 @@
 use axum::extract::State;
 use conduwuit::{
-	Err, Result, at, err,
+	Err, Result, at,
 	matrix::{
 		event::{Event, Matches},
 		pdu::PduCount,
@@ -85,11 +85,11 @@ pub(crate) async fn get_message_events_route(
 			.users
 			.get_device_metadata(sender_user, device_id)
 			.await
-			.or_else(|_| err!(Request(NotFound("device {device_id} not found?"))))?;
+			.expect("Device metadata should exist for authenticated device");
 		device.last_seen_ts = Some(MilliSecondsSinceUnixEpoch::now());
 		services
 			.users
-			.update_device_metadata(sender_user, device_id, &device)
+			.update_device_last_seen(sender_user, device_id, &device)
 			.await?;
 	}